From 7b90b90780d3bb5a1b4a1c060fac1d2c4eb2a8dc Mon Sep 17 00:00:00 2001 From: Shehjar Tikoo Date: Sun, 19 Jul 2009 03:25:45 +0000 Subject: libglusterfsclient: Move DHT root-lookup workaround to init The workaround for the DHT requirement for a lookup on / needs to be done only once when the xlator graph is inited. Doing it on every path's lookup results in a major performance penalty when using distribute subvolumes upwards of 16, as reported by Avati. Ref: bug 152 Signed-off-by: Anand V. Avati BUG: 152 (libglusterfsclient: DHT workaround is a major performance bottleneck) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=152 --- libglusterfsclient/src/libglusterfsclient.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'libglusterfsclient/src/libglusterfsclient.c') diff --git a/libglusterfsclient/src/libglusterfsclient.c b/libglusterfsclient/src/libglusterfsclient.c index 6ff6f243f..c4624ecb6 100755 --- a/libglusterfsclient/src/libglusterfsclient.c +++ b/libglusterfsclient/src/libglusterfsclient.c @@ -961,6 +961,7 @@ glusterfs_init (glusterfs_init_params_t *init_ctx) int32_t ret = 0; struct rlimit lim; uint32_t xl_count = 0; + loc_t new_loc = {0, }; if (!init_ctx || (!init_ctx->specfile && !init_ctx->specfp)) { errno = EINVAL; @@ -1261,6 +1262,17 @@ glusterfs_init (glusterfs_init_params_t *init_ctx) } pthread_mutex_unlock (&priv->lock); + /* workaround for xlators like dht which require lookup to be sent + * on / */ + libgf_client_loc_fill (&new_loc, ctx, 1, 0, "/"); + ret = libgf_client_lookup (ctx, &new_loc, NULL, NULL, NULL); + if (ret == -1) { + gf_log ("libglusterfsclient", GF_LOG_ERROR, "lookup of /" + " failed"); + return NULL; + } + libgf_client_loc_wipe (&new_loc); + first_init = 0; return ctx; -- cgit